Safety keyless lock



J. MACE.

SAFETY KEYLESS LOCK.

APPLICATION FILED NOV. 29, 1918.

Patented Apr. 20, 1920.

3 SHEETSSHZ I INVENTOR 7u2eo1fi1ace. BY :6 Wqava Patented Apr. 20, 1920.

3 SHEETS-SHEET 2.

J. MACE.

SAFETY K EYLESS LOCK. APPLICATION FILIED4NOV. 29, 1918.

JULES MACE, or GRASSE, FRANCE.

SAFETY KEYLESS LOCK.

' Specification of Letters Patent.

Patented Apr. 26, 1920.

Application filed November 29,1918. Serial No. 264,666.

To all whom it may concern.

Be it known that I, JULns Maori, a citizen of France, residing at Grasse, Alpes Maritimes, France, have invented a new and Improved Safety Keyless Look, of which the following is a specification.

My present invention has for its purpose to provide a safety keyless lock, the construction of which is so designed that the parts thereof may be readily adj sted to operate under different secret combinations, so that a door or other relatively movable part may be readily opened by one knowing the combination, without a key, which may be used in connection with an ordinary lock and in which the locking elements can be readily shifted so the key operated parts are rendered useless, as the possessor of the secret combinations of the lock may desire.

lVith other objects in view, all of which will hereinafter be fully stated, my.inven- 'tion embodies, in a lock of the general.

character referred to, certain featur s of construction and peculiar combinations of parts hereinafter explained, specifically pointed out in the appended claims and illustrated in the accompanying drawings, in which:

Figure l is a sectional elevation of my improved lock device, the same being taken on the line 11 on Fig. 2.

Fig. 2 is a horizontal section thereof taken substantially on the line 2-2 on Fig. 1.

Fig. 3 is a view similar to Fig. 1, the section being taken on the line 33 on Fig. 4t and illustrates the operating disks so positioned as to allow the lock notches thereof to slide laterally over the bit members, when adjusting the parts for unlocking the bolt.

F 4 is a cross section on the line on Fig. 8, looking in the direction of the arrow.

Fig. 5 is a detail section that illustrates the manner in which the locking bolt is fed back to release the cover screw safety catches. I

Fig. 6 is a detail perspective view of the bit carrying end of the bolt or looking bar.

Figs. 7 to 18 inclusive are diagrams showing the relation of the combination dial to the tumbler disks and the operation of the four disks, as will hereinafter be specifically stated.

Fig. 19 is a detail. perspective view of a portion of one of the tumbler disks and its adjustable stop carrying ring.

Briefly stated, my construction of lock comprises a casing, which may be of the usual rectangular shape and which includes a front or face plate 1, end portions v22 integral with the face plate 1 and a back or cover plate 3, the latter being removably 'mounted on the back, top, bottom and end edges of the casing by screw connections that are so arranged that they cannot be removed by any one except those familiar with the secret adjustment and operation of the locking mechanism.

The locking mechanism, generally stated, includes a plurality of tumbler disks controlled by a dial plate on the front face of the casing combined with an operating knob operable by those familiar with the combination'or combinations on which the disks are set.

Lctch devices are also provided that cooperate with the tumbler disks and which constitute a part of the lock mechanism and the said latch devices include a member that extends through the face plate of the casing for shifting the latches for interlockably engaging and holding the several disks, when set by the dial knob, to the required combined positions for permitting the shifting of the lock bolt to the locking and unlocking adjustments.

Means are also included in the complete construction of my improved lock mechanism, that embrace an operating knob located on the outside of the back or front face of the lock casing for shifting the lock bolt to the locking and unlocking positions.

In the drawings, 1 have shown four combinations of tumbler disks although a greater or lesser number may be employed.

The whole construction of the tumbler disks, the tumbler shaft and the cotiperating devices that connect with the said tumbler shaft is fully illustrated in Figs. 2, 3 and 4, by reference to which it will be noticed that the disks, designated 5, 6, 7 and 8, are of substantially like construction and each has an annular rim 9. Each of the said rims 9 has a slot or recess respectively designated 50, 60, TO, 80, which recesses, it should be here stated, constitute the registering elements that must, under a proper manipulation of the several disks and hereinafter fully explained, be brought into proper alinement to permit the desired unlocking shift or movement of the bolt frame or disk cage, as presently fully described.

Each of the aforesaid disks carries an alinement or starter pin 1.0 and each of the said pins 10 is attached to a flat ring 11, one of such rings 11 being prov ded for each disk.

Each of the rings 11 is staggeredly apertured as at 13, which provides for very accurate adjustment of the said ring and its stop pin 10 in relation to its respective lock notch. This adjustment is effected by the loosening up of the three or more clamping screws 1% and extracting the lock pin Z, thus allowing the ring to be moved around to any position wanted. then inserted through one aperture 13 in the ring into either of the two holes 13 in the disk as the case may be and the clamp screws screwed home, thus the disk is positively held against possible disarrangement.

Each of the three front disks 5, 6 and '7 has a peripheral toothed annulus 51, 61, 71 respectivel the teeth of which are preferably of inverted V shape to facilitate a correct engagement therewith of latches having correspondingly shaped engaging ends, hereinafter further explained.

All of the disks are held in frictional en gagement with annular bosses 15, 15 that are integral parts of or are fixedly attached to a central shaft 17 mounted in the front and back faces of the lock casing, as is best shown in Fig. 4.

Each boss 15 includes a laterally projected annular bearing flange 13 and the adjacent faces of each pair of disks 5, 6, 7 and 3 are. formed with offset bearing portions 1 1 that ride against the said flanges 13, see Fig. 4.

20, 20 designate fiat rings and they are screwed onto the flanges or necks 18 of the bosses 15 and they serve to retain the aforesaid disks in light frictional engagement with the said bosses 15.

21 designates a toothed wheel fixed on one end of the shaft 17 and the said wheel 21 meshes with a like diameter toothed wheel 22 having a corresponding number of teeth.

\Vheel 22 is fixedly mounted on the inner end of a dial knob shaft 23, which shaft passes through an opening in the casing front and i. disposed laterally of the toothed wheel 21, as is clearly shown in Fig. 2.

Each of the tumbler disks 5 and 8 has apertures 25 which provide for unscrewing the retainer or ring plates 20.

26 designates what is hereinafter termed a latch plate, and this plate, whose opposite side edges are dove-tailed, has vertical movement in vertical recesses 27 on the inside of the frontlock plate 1 and the opposite edges The lock pin Z is' of the said recesses are shaped to receive the dove-tailed edges of the plate 26, as is clearly shown in Fig. 2.

, The latch plate 26, at the upper end thereof, has an inwardly extended arm 28, and a like arm 29 is attached to the said plate 26 at the lower end thereof, see Fig. 4E, and the latter figure also clearly showing the upper arm 28 provided with two downwardly projected latch teeth 30 and the lower arm similarly provided with three upwardly extending latch teeth 31.

The upper arm 28 extends across and above the first two disks and 6 and it has its latch teeth 30 adapted for being'moved into contact with the toothed rim 51 and 61 on the said two disks 5 and 6.

Arm 29 extends across and under the first three disks or members 5, 6 and 7 and it has three latches 31 adapted for being moved upwardly into engagement with the toothed rim 51, 61 and 71 of the said three disks.

It should be here stated that the latch devices are provided for holding the disk 5 at its set position, when adjusting the parts to the unlocking position, as presently more fully explained, and while the disk 6 is being shifted, and for holding the disks 5 and 6 to their shifted position as the disk 7 is being manipulated to the proper position and finally for holding the three disks 5, 6 and 7 as the last disk 8 is brought into proper alinement with the remaining disks 5, 6 and 7 32 designates a stop that is secured to the bottom of the lock casing and the said step carries two upright staffs which extend between each of the pairs of disks 6 and 7, S and constitute stops against which the starting pins 10 that project from the adjustable disks 5, 6 and 7, 8 abut, when the several disks 5, 6 and 7, 8 are turned back to the starting point during the manipulation of the locking element, when shifting them to the unlocking adjustments in the manner to be presently explained.

33 designates what 1 term the combined bolt frame and disk cage, since the said disks 5, 6 and 7, 8 are located within the opposite side and end bars or members 34, 3st and 35, 35.

At one end, the frame has a locking bolt 36 which normally extends through a bolt passage 37 in one end of the lock casing.

38, 38 designates a pair of oppositely disposed rack bars, and these are slidably mounted within the dove-tailed grooves 39., 39 in the underside of their respective side members 34 of the bolt holding frame and are adapted for being held on the frame 33 by screws as is clearly shown in dotted lines Fig. 2.

The ends of the rack bars 38, 3S ride through passages in that end of the lock casing opposite the bolt receiving end.

That side member of the bolt frame 33 next the front casing plate has a rectangular opening 40 and the other side 33 has a cor respondingly shaped opening or groove. 40 in which the front and rear ends of the shaft 17 project.

At the bolt end, the bolt frame has three.

inwardly extended horizontal bits 41, 42, 43, the middle one of which is somewhat wider than the others, so as to co6perate with the two middle disks 6 and 7, while the outer or end bits 41, 43 are arranged for coiiperating with their adjacent outer and inner disks 5 and 8.

A cross shaft 16 is journaled in suitable hearings in the front and back casing members l and 3 and one end thereof projects through the front plate and carries a milled knob 44.

By referring now more particularly to Figs. 2 and 4, it will be noticed that the shaft 16 carries a pair of gears 45, 45 that mesh with the toothed edges or rack bars 38, 38, it being understood that, the bolt frame is free to be moved lengthwise by properly turning the knob 44, the bolt frame can be readily shifted to withdraw the bolt, when the tumbler disks 5 to 8 have been properly set to the bolt unlocking position.

At the inner end the bolt frame has a single latch tooth 46 that engages with the annularly toothed rim 51 of the first or front disk 5, and which, when the lock bolt is shifted to the outermost locking position, serves to hold the said disk stationary while the next disk 6 is being brought into proper position to be then held with the disk 5 by the latch tooth 30.

The bolt frame has a limited free play to provide for releasing the latch tooth 46, when it is desired to unlock the bolt. The extra latch 46 adds another secret element to be considered, when it is desired to open the lock.

As before noted, one of the cover plates of the lock casing is removable and the means for securing it and the casing is such, that only those familiar with the working of the lock can remove said cover plate.

By referring now particularly to Figs. 1,2 and 5, it will be noticed the back cover plate 3 has an outwardly inclined vertical edge 47 that fits under an undercut vertical flange 48 formed on the back edge of that end of the casing through which the locking bolt passes.

At the other end, the cover plate has its edge beveled to form a miter connection with the adjacent back edge of that end of the casing.

Two long screws 49, 49, with countersunk heads, pass through upper and lower apertures 62, 63 in the back plate 3 and the inner ends of the said screws, when they are applied for securing the plate 3 onto the easing, engage threaded sockets 60, 60 in the front wall of the casing, see Fig. 2.

Each screw 49, 49 has a latch tooth 52 and the said teeth 52, when the parts are secured to complete the lock casing, are radially projected with respect to their respective screws 49 so that any attempt to withdraw the said screws 49, 49 causes the latch teeth 52 to engage upper and lower locking hooks 53, 53, on what I term, the screw lock plate 54, which plate is normally projected for holding the hooks 53, 53 in position for being engaged by the latch teeth 52, 52 on the screws.

A leaf spring 55 interposed between and engaging the plate 54 and the adjacent end of the casing, serves to hold the plate 54 to its normal or screws locking position.

The screws lock plate 54 can be shifted so its hooks 53, 53 are moved out of connection with the latches 52 on the screws, when the lock bolt is free for being moved back to its unlocked position within the casing, and when thus freely movable, by continuing the inward thrust of the bolt frame, the back or end member 05 of said frame engages and pushes the screws lock plate 54 back against the tension of the spring 55, the rack and gear connection serving to hold the said plate to its pushed back position, while removing the screws 49, 49, it being clear from Figs. 2 and 5 that, when the said two screws 49, 49 are withdrawn, the back plate 3 and be readily removed to give access to the interior parts of the lock.

As before stated, the latch plate 26 is slidably mounted in the inner face of the casing front 1 and the movements of the said plate, up and down, provide for engaging the several upper and lower latches 30 and 31 with the tootl'ied flanges of the several disks 5, 6, and 7, when the latter are set in position for bringing their notches 50, 60 and into proper alinement with 'the several bits on the bolt frame hereinbefore mentioned.

In order to keep the combination of movements of the four disks in mind, a dial plate 100 is mounted on the front of the lock casing which surrounds the operating knob {U and on this dial plate is sealed in regular order the letters of the alphabet.

When four tumbler disks constitute the permutation elements, as shown and before described, four angles in a certain ord.r of succession must be reniembered.

To that end, the knob has four imaginary angle lines 5, 6, and S that constitute a part of the means for delivering the set of the tumbler disks 6, 7 and 8 respectively.

The face of the knob also has an angle line B engraved thereon that constitutes the means for determining the last or final movement of the knob, wh en setting the several stated tumbler disks, a stop line A on &

the dial being also provided with which the site the fifth space after the letter K on the angle line B alines at each final adjustment of the lamb.

Assuming the word Keyless look as the secret Word for the combination on which the locking mechanism is to be adjusted, to provide for freeing the bolt frame so that it may be quickly shifted to move the bolt to the unlocked position shown in Fig. 3, it being also understood that the four tumbler disks 5, 6, 7 and 8 are held in such frictional contact with the bosses 15, 15 attached to the shaft 17 that when free of resistance, the said disks turn with the said shaft.

In order to make it easy for one knowing the secret of the lock to remember the same and the means for effecting the unlocking thereof, I have devised the following: The knob 00 has engraved thereon the letters of the alphabet arranged in four columns of six each, (there being six spaces between each letter on the dial) and the numerals 1 through 6 opposite the corresponding letter of each column, the letters y and 2 thus left over are placed beneath the columns with their corresponding numerals 1 and 2. The word 'Keyless lock being used as the secret word, I elect to use the odd letters K, Y, E, S as the master letters and they serve to denote the four angles of movement the knob goes through in effecting the setting of the four tumbler disks. These master letters are modified by the go between letters E, L, S, L. Thus it will be seen that a person knowing the secret word and seeking to properly set the first of the tumbler disks whose angle is designated by the master letter K, looks for the number opposite the modifying letter E and finding it to be 5, knows that the angle for the said disk is accurately five spaces past the letter K. To find the other angles, the same action is followed for the remaining master letters Y, E, S and their modifying letters L, S, L. It will be readily seen that the letters engraved on the knob reveal nothing to any one ignorant of the secret word.

The operation of opening the lock is best explained as follows:

In starting the unlocking operation, the knob 00 is turned to the right (see arrow 0 on diagram Fig. 7) at least 360 degrees. The rotation of the knob shaft, through the gears 22, 21, turns the said shaft 17 vto the left and the tumbler disks 5 to 8 in like direction, see the arrow (Z on Fig. 8, until the starting pins 10 of all of the disks are brought into engagement with the stops 4, which latter arrest further movement of the disks in the direction stated, thereby bringing the starting pins 10 of all of the disks in proper alinement or starting position.

The knob 00 is now continued in the forward direction indicated by the arrow 0 until the angle line B on the knob comes oppodial, it being understood that during such continued forward rotation of the knob, the disks remain at their starting point.

The knob 00 is then turned counterclockwise or backward until the angle line B registers with the stop line A. During this last or counterclockwise movement of the knob, the disks, by reason of their frictional contact with the bosses 15 turn in like direction and such movement bringsthe bit notch 50 in the disk 5 in alinement with its cooperating bit ll on the lock bar, see Fig. 1.

After the disk 5 has been set as stated, by then giving the bolt plate a slight movement in the locking direction (see the arrow g on Fig. 1), which is done by slightly turning the bolt shifting knob, the single latch 16 on the bolt frame will interlock with the toothed rim ,on the disk 5 and thereby hold the said disk 5 to its set position and from further turning in either direction during further manipulation of the knob.

The knob w is then again turned to the right at least 360 degrees and continued in the said direction until the angle line B registers at the sixth space after Y (see diagram Fig. 10), after which the said knob is again turned backward to the stop line A carrying with it the disks 6, 7 and 8 and at which time the bit notch 60 in the disk 6 (see dotted lines on Fig. 12) will be in alinement with its respective bit 42.

After the adjustment of the second disk 6, as stated, the latch bar 26 is lowered through the medium of a finger lever on the outside of the lock casing and which is attached to a shaft 66 that carries a finger 67 that engages with the upper end of the latch bar 26, as is best shown in Figs. 2, 3 and 4.

The lowering of the bar 26 causes the two upper latches 30 to move into engagement with the toothed rims on the disks 5 and 6 and thereby locks the said two disks 5 and 6 to their said positions.

Knob as is now again turned to the right 360 degrees or more until the line B registers at the first space after E on the dial plate see diagram Fig. 13). and then moved farther back until it registers with the stop line A, which operation brings the disk 7 with its bit notch 70 in line with the -cen tral lock bit that cooperates with the two disks 6 and 7.

The latch bar is now raised to thereby elevate the three bottom latches 31 (see Fig. 3) into engagement with the toothed rim on the three disks 5, 6 and 7.

The knob as is now finally turned to the right at least 360 degrees and continued until the line B on the dial registers at the sixth space after S see the diagram Fig. 16), after which the knob is turned back to the stop line A, carrying with it the now only movable disk 8 which brings its bit notch 80 in alinement with its respective bolt bit, it being understood that the bolt notches 50, 60, 70, 80 of the respective disks 5, 6, 7 and 8 are now in alining positions, as indicated by the dotted lines on the diagrams 9, 12, 15 and 18.

After the disks 5, 6, '7 and 8 have been set, as stated, by turning the bolt knob a l to the right, the bolt frame is moved in the direction of the arrow 2, see Fig. 1, and as the bolt bits can now pass through the several notches 50, 60, 70, 80 in the tumbler disks 5, 6, 7 and 8, the bolt is readily retracted and the lock opened.

From the foregoing description taken in connection with the drawings, the complete construction, the manner of operation and the advantages of my present invention will be readily apparent to those skilled in the art to which my invention relates.

While the construction and the arrangement of the parts constituting my present type of lock mechanism illustrates a perfect and practical form, it is to be understood that various modifications and changes in the detail assemblage of the said parts may be made without departing from the spirit of my invention as comes within the scope of the appended claims.

lVhat I claim is:

1. In a look, a casing, the latter including a removable cover plate, means for normally holding the said plate locked in position on the casing, a lock bolt slidable within and through one end of the casing, the said plate holding means including a resilient locking element that is released by the bolt plate when it is slid inwardly to its unlocked position, finger controlled means for shifting the said bolt, permutation elements supported within the casing for holding the bolt to its locked position and selective mechanism operable from without the casing for adjusting the said elements, whereby the slide bolt is released for being freely moved inwardly as set forth.

2. In a lock, a casing, a shaft rotatable within the casing, a plurality of disks mounted upon and held in frictional engagement with the shaft, each of the said disks having a bit passage, a frame movable within the casing and including a locking bolt projected through the casing, means operable from without the casing for shifting the bolt frame, means limiting the rotation of the disks in one direction at a common starting point, whereby to hold the disks from rotation as the shaft continues in its for ward direction, a dial externally of the casing and a knob controlled device operable over the dial for effecting rotation of the shaft in opposite directions, whereby to individually rotate the disks in reverse directions to predetermined points, said bolt frame having bit members for engaging the bit passages in the disks when the said disks are set to their predetermined positions for permitting shifting of the bolt frame to unlock the bolt.

3. In a look, a casing, a shaft rotatable within the casing, a plurality of disks mounted upon and held in frictional engage ment with the shaft, each of the said disks having a bit passage, a frame movable within the casing and including a locking bolt projected through the casing, means operable from without the casing for shifting the bolt frame, means limiting the rotation of the disks in one direction at a common starting point, whereby to hold the disks from rotation as the shaft continues in its forward direction, a dial externally of the casing and a knob controlled device operable over the dial for effecting rotation of the shaft in opposite directions, whereby to individually rotate the disks in reverse directions to predetermined points, said bolt frame having bit members for engaging the bit passages in the disks when the said disks are set to their predetermined positions 'for permitting shifting of the bolt frame to unlock the bolt, and means operable from without the casing for locking the disks to their selective positions.

In a lock, a casing, a shaft rotatably mounted in the casing, a bolt frame mounted in the casing, the said casing having a passage through which the bolt end of the said frame projects, means for effecting lateral movement of the frame to project or retract the said bolt end, disks mounted upon and frictionally engaging the shaft and adapted for rotation with the shaft in reverse directions, said disks each having a bit passage, the bolt frame having a bit adapted for entering the said bits passage, when the said passages are brought into alinement therewith, a stop for limiting the rotation of the disks in the forwar direction as the shaft continues in such direction, means operable from the outside of the easing for rotating the shaft and indicating ele ments to determine the reverse rotation of the shaft and the disks for bringing the bit notches in the disks in alinement with the bolt frame bit to thereby permit of shifting the bolt frame to the unlocked position.

5. In a look, a casing, a shaft rotatably mounted in the casing, a bolt frame mounted in the casing, the said casing having a pa sage through which the bolt end of the said frame projects, means for effecting lateral movement of the frame to project or retract the said bolt end, disks mounted upon and frictionally engaging the shaft and adapted for rotation with the shaft in reverse directions, said disks each having a bit passage,

the bolt frame having bits adapted for entering the said bit passages, when the said the lock casing for actuating such means, the

passages are brought into alinement therewith, a stop for limiting the rotation of the disks in the forward direction as the shaft continues in such direction, means operable from the outside of the casing for rotating the shaft and indicating elements to determine the reverse rotation of the shaft and the disks for bringing the bit notches in the disks in alinement with the bolt frame bit to thereby permit of shifting the bolt frame to the unlocked position, and means for holding the disks to their selected adjustment.

6. In a lock, a casing, a shaft rotatably mounted in the casing, a bolt frame mounted in the casing, the said casing having a passage through which the bolt end of the said frame projects, means for effecting lateral movement of the frame to project or retract the said bolt end, disks mounted upon and frictionally engaging the shaft and adapted for rotation with the shaft in reverse directions, said disks each having a bit passage, the bolt frame having bits adapted for entering the said bit passages, when the said passages are brought into alirfement therewith, a stop for limiting the rotation of the disks in the forward direction as the shaft continues in such direction, means operable from the outside of the easing for rotating the shaft and indicating elements to determine the reverse rotation of the shaft and the disks for bringing the bit notches in the disks in alinement with the bolt frame to thereby permit of shifting the bolt frame to the unlocked position, and means for holding the disk to its selected adjustment, the said means including devices exterior of the lock casing for actuating such means.

7. In a lock, a casing, a shaft rotatably mounted in the casing, a bolt frame mounted in the casing, the said casing having a passage through which the bolt end of the said frame projects, means for effecting lateral movement of the frame to project or retract the said bolt end, disks mounted upon and frictionally engaging the shaft and adapted for rotation with the shaft in reverse directions, said disks each having a bit passage, the bolt frame having bits adapted for entering the said bit passages, when the said passages are brought into alinement therewith, a stop for limiting the rotation of the disks in the forward direction as the shaft continues in such direction, means operable from the outside of the casing for rotating the shaft and indicating elements to determine the reverse rotation of the shaft and the disks for bringing the bit notches in the disks in alinement with the bolt frame bit to thereby permit of shifting the bolt frame to the unlocked position, and means for holding the disks to their selected adjustments, the said means including devices exterior of said devices including an annular toothed rim on each disk and latches on the bolt frame for engaging with the said toothed rim, when the bolt frame is shifted to project the bolt end thereof to the locking position.

8. In a look, a casing, a shaft rotatably mounted in the casing, means including an operating knob outside of the casing for imparting rotation to the shaft in either direction, a bolt frame mounted in the casing, the said casing having'a passage through which the bolt end of the frame extends, disks mounted upon and having frictional engagement with the shaft and adapted to rotate in reverse directions with the shaft, the said bolt frame having locking bits and each of the disks a bit receiving notch, an adjustable stop device for limiting the forward rotation of the disk, as the shaft continues in such direction, an indicating means on the casing for determining the reverse rotation of the shaft and the disks for setting the disks with their bit receiving notches in alinement with the bit on the bolt frame, whereby to permit of withdrawing the bolt frame from its locking position, and further means for holding the disks from rotation, when set to their selected position.

9. In a lock, a casing, a shaft rotatably mounted in the casing, means including an operating knob outside of the casing for imparting rotation to the shaft in either direction, a bolt frame mounted in the casing, the said casing having a passage through which the bolt end of the frame extends, disks mounted upon and having frictional engagement with the shaft and adapted to rotate in reverse directions with the shaft,

the said bolt frame having a locking bit and the disk a bit receiving notch, an adjustable stop device for limiting forward rotation of the disks, as the shaft continues in such direction, an indicating means on the casing for determining the reverse rotation of the shaft and the disks for setting the disks with their bit receiving notches in alinement with the bit on the bolt frame, whereby to permit of withdrawing the bolt frame from its locking position, and further means for holding the disks from rotation, when set to their selected position, the said stop devices including a ring adjustably mounted on end of the disk, a stop pin projected from the ring and an abutment member fixedly attached to the casing and which projects in the path of rotation of the stop pin.

10. In a lock, a casing which includes a removable cover plate, a laterally shiftable locking bolt, a selective mechanism that cooperates with the said bolt for holding it to its locking position, means including an operating member externally of the casing for adjusting the selective mechanism for freeing the bolt so the said bolt may be laterally shifted to its unlocked position, means for normally holding the cover plate locked against removal, the said means including bolts that take through the cover plate and engage the opposite casing wall, the said bolts each having a latch tooth, a locking plate having hooks for engaging the latch teeth on the screw bolts to hold the said bolts from turning, a spring engaging the said lock plate for holding it in locked engagement with the screw bolt, the said lock plate being adapted for being engaged by the bolt frame and thereby shifted to disengage the screw bolts as the said bolt frame is laterally shifted.

11. In a lock of the character described, the combination of a laterally shiftable bolt having a bit, an operating shaft, a plurality of disks each having a bit passage, said disks being mounted upon and having frictional engagement with the shaft to rotate therewith in reverse directions, a stop device for limiting rotation of the disks with the shaft in one direction, the said device including a ring normally adjustable on the disk and having a projecting pin, and a fixed member with which the pin is adapted for engagement when the disks are moved in forward direction with the operating shaft.

12. In a lock mechanism of the character described, a casing, a bolt frame laterally movable within the casing and havin bit members, a plurality of reversibly rotatable disks disposed within the casing, arbitrarily arranged stop devices for limiting the rotation of the said disks in one direction, means for rotatin all of the said disks in one direction and for continuing those disks not retarded from movement in such direction, each of said disks having a bolt bit passage, an indicator dial cooperative with the disk rotating means for determining the degree of reverse rotation of the disks when adjusting the said disks to bring their bit passages in alinement with the bolt bits, and means operable externally of the casing for shifting the bolt frame to enter the bolt its through the bit passages in the disks whereby to permit moving the bolt frame to the unlocking position.

1 3. In a lock mechanism of the character described, a casing, a bolt frame laterally movable vithin the casing and having bit members, a plurality of reversibly rotatable disks disposed wi hin the casing, arbitrarily arranged stop devices for limiting the rotation of the said disks in one direction, means for rotating all of the said disks in one direction for continuing those disks not retarded from movement in such direction, each of said disks having a bolt bit passage, an indicator dial combined with the disk rotating means for determining the degree of reverse rotation of the disks when adjusting the said disks to bring their bit passages in alinement with the bit bolts, means operable externally of the easing for shifting the bolt frame to enter the bolt bits through the bit passages in the disks whereby to permit moving the bolt frame to the unlocking position, the said 382L113 including a knob controlled shaft and rack and gear devices connecting the shaft and the bolt frame.

l i, In a lock mechanism of the character described, a casing, a bolt frame laterally movable within the casing and having bit members, a plurality of reversibly rotatable disks disposed within the casing, arbitrarily arranged stop devices for limiting the ro tation of the said disks in one direction, means for rotating all of the said disks in one direction and for continuing those disks not retarded from movement in such direction, each of said disks having a bolt bit passage, an indicator dial combined with the disk rotating means,- for determining the degree of reverse rotation of the disks when adjusting the said disks to bring their bit passages in alinement with the bolt bits, means operable externally of the casing for shifting the bolt frame to enter the bolt bits through the bit passages in the disks whereby to permit moving the bolt frame to the unlocking position, the said means including a knob controlled shaft, rack and gear devices connecting the shaft and the bolt frame, and means for holding the succes sively adjusted disks to the selected positions.

15. In a lock mechanism of the character described, a casing, a bolt frame laterally movable within the casing and having bit members, a plurality of reversibly rotatable disks disposed within the casing, arbitrarily arranged stop devices for limiting the rotation of the said disks in one direction, means for rotating all of the said disks in one direction. and for continuing those disks not retarded from movement in such direction, each of said disks having bolt bit passage, an indicator dial combined with the disk rotating means for determining the legree of reverse rotation of the disks when adjusting the said disks to bring their hit passages in alinement with the bolt bits, means operable externally of the casing for shit ting the bolt frame to enter the bolt bits through the bit passages in the disks whereby to permit moving the bolt frame to the unlocking position, the said means including knob controlled shaft, rack and gear devices connecting the shaft and the bolt frame, means for holding the successively adjusted disks to the selected positions, said means including a finger actuated device located on the outside of the casing.

16. In a lock, a casing, a bolt frame slidable on the casing, a shaft rotatably mounted in the casing, a plurality of disks mounted on and frictionally engaging the shaft, said disks each having a bit passage, the said passages being relatively staggeredly disposed, the bolt frame having bits, one for each passage of the disks, means for stopping the rotation of the disks in a forward direction, the said means including a 10 member fixed on the casing and a projecting pin on each disk, each pin being adj ustably mounted on its respective disk, an indicating means including a dial and an operating knob for determining the forward and re verse rotations of theseveral disks, a connection joining the said knob with the disk carrying shaft, and means for shifting the lock frame when the said frame is'at its released position.

JULES MACE. 

